I make a get request from a url, and I try to use the response further, in another function, so this is what I tried first.
var request = require("request");
function getJSON(getAddress) {
request.get({
url: getAddress,
json: true,
}, function (error, response, body) {
if (!error && response.statusCode == 200) {
return body;
}
})
}
function showJSON(getAddress, callback) {
var test = callback(getAddress);
console.dir(test);
}
showJSON('http://api.open-notify.org/astros.json', getJSON);
yet, when i run my script
node ./test.js
I get
'undefined' as a console message
I don`t know where this may come from, as I am new to node.js, javascript
var test = callback(getAddress);
is an asynchronous function
console.dir(test);
won't wait for it to finish before executing, hence you are getting undefined. to make it work you would have to do
var request = require("request");
function getJSON(getAddress, callback) {
request.get({
url: getAddress,
json: true,
}, function (error, response, body) {
if (!error && response.statusCode == 200) {
callback(body);
}
})
}
function showJSON(getAddress, callback) {
callback(getAddress, function(test){
console.dir(test);
});
}
showJSON('http://api.open-notify.org/astros.json', getJSON);
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